Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations

doi:10.3847/1538-4365/abbb2d

	Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations
	Zong, Weikai 7; Fu, Jian-Ning 7; Cat, Peter De 6; Wang, Jiaxin 7; Shi, Jianrong 5; Luo, Ali 5; Zhang, Haotong 5; Frasca, A.4; Molenda-Zakowicz, J.2; Gray, R. O.3
刊名	ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
	2020-11-01
卷号	251 期号:1 页码:15
关键词	Catalogs Spectroscopy Surveys Fundamental parameters of stars Astrostatistics Astronomy databases
ISSN号	0067-0049
DOI	10.3847/1538-4365/abbb2d
产权排序	11
英文摘要	Phase II of the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)-Kepler/K2 survey (LK-MRS), initiated in 2018, aims at collecting medium-resolution spectra (R similar to 7500; hereafter MRS) for more than 50,000 stars with multiple visits (similar to 60 epochs) over a period of 5 yr (2018 September to 2023 June). We selected 20 footprints distributed across the Kepler field and six K2 campaigns, with each plate containing a number of stars ranging from similar to 2000 to similar to 3000. During the first year of observations, the LK-MRS has already visited 13 plates 223 times over 40 individual nights, and collected similar to 280,000 and similar to 369,000 high-quality spectra in the blue and red wavelength ranges, respectively. The atmospheric parameters and radial velocities for similar to 259,000 spectra of 21,053 targets were successfully calculated by the LAMOST stellar parameter pipeline. The internal uncertainties for the effective temperature, surface gravity, metallicity, and radial velocity are found to be 100 K, 0.15 dex, 0.09 dex, and 1.00 km s(-1), respectively, when derived from a medium-resolution LAMOST spectrum with a signal-to-noise ratio (S/N) in the g band of 10. All of the uncertainties decrease as S/N increases, but they stabilize for S/N > 100. We found 14,997, 20,091, and 1514 stars in common with the targets from the LAMOST low-resolution survey (LRS), Gaia, and the Apache Point Observatory Galactic Evolution Experiment (APOGEE), respectively, corresponding to fractions of similar to 70%, similar to 95%, and similar to 7.2%. In general, the parameters derived from LK-MRS spectra are consistent with those obtained from the LRS and APOGEE spectra, but the scatter increases as the surface gravity decreases when comparing with the measurements from APOGEE. A large discrepancy is found with the Gaia values of the effective temperature. Comparisons of the radial velocities of LK-MRS to Gaia and LK-MRS to APOGEE nearly follow a Gaussian distribution with means of mu similar to 1.10 and 0.73 km s(-1), respectively. We expect that the results from the LK-MRS spectra will shed new light on binary stars, asteroseismology, stellar activity, and other research fields.
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资助项目	Beijing Natural Science Foundation[1194023] ; National Natural Science Foundation of China (NSFC)[11673003] ; National Natural Science Foundation of China (NSFC)[11833002] ; National Natural Science Foundation of China (NSFC)[11903005] ; National Development and Reform Commission ; Fundamental Research Funds for the Central Universities ; Special Funding for Advanced Users ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; INAF ; Wroclaw Centre for Networking and Supercomputing[224] ; project LAMOST Observations in the Kepler field (LOK)[BL/33/FWI20] ; NSFC[11973052] ; Youth Innovation Promotion Association, CAS ; Astronomical Big Data Joint Research Center ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-SLH007]
WOS关键词	PULSATING STARS ; BINARY-SYSTEM ; STELLAR ; ASTEROSEISMOLOGY ; IDENTIFICATION ; MISSION ; LAMOST ; METALLICITY ; PARAMETERS ; TELESCOPE
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000588839400001
资助机构	Beijing Natural Science Foundation ; National Natural Science Foundation of China (NSFC) ; National Development and Reform Commission ; Fundamental Research Funds for the Central Universities ; Special Funding for Advanced Users ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; INAF ; Wroclaw Centre for Networking and Supercomputing ; project LAMOST Observations in the Kepler field (LOK) ; NSFC ; Youth Innovation Promotion Association, CAS ; Astronomical Big Data Joint Research Center ; Key Research Program of Frontier Sciences, CAS
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3713]
专题	新疆天文台_光学天文与技术应用研究室
通讯作者	Zong, Weikai
作者单位	1.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 2.Univ Wroclaw, Astron Inst, Ul Kopernika 11, PL-51622 Wroclaw, Poland 3.Appalachian State Univ, Dept Phys & Astron, Boone, NC 28608 USA 4.INAF Osservatorio Astrofis Catania, Via S Sofia 78, I-95123 Catania, Italy 5.Natl Astron Observ, CAS Key Lab Opt Astron, Beijing 100101, Peoples R China 6.Royal Observ Belgium, Ringlaan 3, B-1180 Brussels, Belgium 7.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 8.Steward Observ, Vatican Observ Res Grp, Tucson, AZ 85721 USA 9.Univ Toulouse, CNRS, UPS, IRAP,CNES, 14 Ave Edouard Belin, F-31400 Toulouse, France 10.Chinese Acad Sci, Natl Astron Obser, Nanjing Inst Astron Opt & Technol, Nanjing 210042, Peoples R China
推荐引用方式 GB/T 7714	Zong, Weikai,Fu, Jian-Ning,Cat, Peter De,et al. Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2020,251(1):15.
APA	Zong, Weikai.,Fu, Jian-Ning.,Cat, Peter De.,Wang, Jiaxin.,Shi, Jianrong.,...&Zuo, Heng.(2020).Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,251(1),15.
MLA	Zong, Weikai,et al."Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 251.1(2020):15.